Navigation system



FIG. 1 is a front perspective view of a navigation system of the present invention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken line showing of navigation system is included for the purpose of illustrating environment and forms no part of the claimed design. 

We claim the ornamental design for a navigation system, as shown and described. 